PIC18LF25J11T-I/SO - 32KB Flash 8-bit MCU, 28-SOIC | Microchip
MPN： PIC18LF25J11T-I/SO ✓ 啟用中PIC18LF25J11T-I/SO 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one silicon die. The PIC18 family uses a RISC modified-Harvard architecture with 16-bit instructions and an 8-bit data path, balancing deterministic interrupt response with high code density. Within the MCU taxonomy, this part belongs to: MCU -> microcontroller -> embedded controller -> semiconductor. Microchip's nanoWatt XLP technology extends sleep-mode current into the nanoampere range, enabling years of operation from a single battery cell in sleep-dominated duty cycles.
Key specifications include 32KB Flash, 4KB RAM, 1KB EEPROM, 10-bit ADC up to 10 channels, two analog comparators, two USART modules, two MSSP (SPI/I2C) modules, and a full-speed USB 2.0 device controller. The wide 2.0V-3.3V operating range, plus 5V-tolerant digital inputs, makes the device flexible for 3.3V-only or mixed-voltage boards. nanoWatt XLP idle currents below 1 µA in Sleep mode are particularly attractive for always-on sensor nodes. The industrial -40°C to +85°C temperature range is suitable for harsh-environment deployment.
Typical applications include USB human-interface devices (HID), battery-powered sensor hubs, industrial sensor transmitters, low-power instrumentation, and small appliances. The internal 31 kHz and 8 MHz RC oscillators, combined with the PLL, allow BOM cost reduction by removing external crystals in many designs. Designers benefit from Microchip's MPLAB X IDE, XC8 compiler, and the free Microchip Libraries for Applications (MLA) USB stack, which shortens USB-device firmware development.
直接替換替代品，適用於 PIC18LF25J11T-I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18LF25J11T-I/SO （相同外形與佔位） — 差異在於 Operating Temperature, ADC, Maximum CPU Speed, Package, Program Memory (Flash).
PIC18LF25J11-I/SO
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18LF24J11T-I/SO
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18LF26J11T-I/SO
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18LF25J10T-I/SO
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18F25J11T-I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18LF25J11T-I/SO 最大額定值與電氣特性
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 RISC modified-Harvard |
| Program Memory (Flash) | 32 KB |
| Data Memory (RAM) | 4 KB |
| Maximum CPU Speed | 12 MIPS (40 MHz internal from PLL) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| ADC | 10-bit, up to 10 channels |
| Analog Comparators | 2 |
| USART | 2 |
| MSSP (SPI / I2C) | 2 |
| USB | USB 2.0 Full-Speed Device, internal transceiver |
| 工作溫度 | -40 °C to +85 °C (Industrial) |
| 封裝 | 28-pin SOIC (SO), 300-mil wide, surface-mount |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 |
| RoHS 狀態 | Compliant |
| Lead-Free / Halogen-Free | Lead-free (per Microchip packaging marking); halogen-free status unknown |
PIC18LF25J11T-I/SO 腳位配置
| 腳位 1 | MCLR — Master Clear (reset) input, active low |
| 腳位 2 | RA0 — PORTA I/O / AN0 |
| 腳位 3 | RA1 — PORTA I/O / AN1 |
| 腳位 4 | RA2 — PORTA I/O / AN2 / VREF- |
| 腳位 5 | RA3 — PORTA I/O / AN3 / VREF+ |
| 腳位 6 | RA4 — PORTA I/O / T0CKI |
| 腳位 7 | RA5 — PORTA I/O / AN4 |
| 腳位 8 | RE3 — PORTE I/O (input only) |
| 腳位 9 | OSC1 — Oscillator input / CLKI |
| 腳位 10 | OSC2 — Oscillator output / CLKO |
| 腳位 11 | RC0 — PORTC I/O / T1OSO |
| 腳位 12 | RC1 — PORTC I/O / T1OSI |
| 腳位 13 | RC2 — PORTC I/O / CCP1 |
| 腳位 14 | RC3 — PORTC I/O / SCL |
| 腳位 15 | RC4 — PORTC I/O / SDA |
| 腳位 16 | RC5 — PORTC I/O / SDO |
| 腳位 17 | RC6 — PORTC I/O / TX |
| 腳位 18 | RC7 — PORTC I/O / RX / DT |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive supply voltage (2.0-3.6V) |
| 腳位 21 | RB0 — PORTB I/O / INT0 / AN12 |
| 腳位 22 | RB1 — PORTB I/O / INT1 / AN10 |
| 腳位 23 | RB2 — PORTB I/O / AN8 |
| 腳位 24 | RB3 — PORTB I/O / AN9 |
| 腳位 25 | RB4 — PORTB I/O / AN11 |
| 腳位 26 | RB5 — PORTB I/O / PGM |
| 腳位 27 | RB6 — PORTB I/O / PGC |
| 腳位 28 | RB7 — PORTB I/O / PGD |
典型應用
PIC18LF25J11T-I/SO 適用於 6 應用s: USB Human Interface Device (HID), Battery-Powered Sensor Hub, Industrial Sensor Transmitter, Low-Power Data Logger, Small Appliance Control, USB-to-Serial Bridge / CDC Device.
USB Human Interface Device (HID)
The PIC18LF25J11T-I/SO is well-suited for low-cost USB HID peripherals such as keyboards, mice, gamepads, and custom control surfaces because it integrates a USB 2.0 Full-Speed device controller with an internal transceiver - eliminating the external PHY and precision 3.3V regulator typically required. With 32 KB of Flash, the part comfortably fits HID class drivers plus application logic, while 4 KB of RAM supports HID report buffers and protocol state. The nanoWatt XLP Sleep mode (under 1 µA) is a critical advantage for USB bus-powered accessories that spend most of their time idle. Designers can rely on the free Microchip Libraries for Applications (MLA) USB stack to accelerate firmware development.
推薦
Battery-Powered Sensor Hub
In battery-powered sensor nodes, the PIC18LF25J11T-I/SO shines through its 2.0-3.6V operating range and nanoWatt XLP Sleep-mode current below 1 µA, enabling multi-year operation on a single CR2032 coin cell or 2x AA alkaline pack. The 10-bit ADC with up to 10 channels handles temperature, humidity, voltage, and current sensing directly, while the two analog comparators enable zero-crossing and brown-out detection without consuming ADC resources. The internal 31 kHz and 8 MHz oscillators - paired with the 4x PLL - eliminate external crystals in most sensor-hub designs, reducing BOM cost and board area. Industrial -40°C to +85°C operation supports outdoor and HVAC deployments.
推薦
Industrial Sensor Transmitter
Industrial 4-20 mA loop-powered transmitters benefit from the PIC18LF25J11T-I/SO's 2.0-3.6V supply range, 10-bit ADC accuracy, and industrial -40°C to +85°C temperature grade. The two USART modules enable simultaneous sensor readout and digital bus communication (RS-232, RS-485), while the two MSSP peripherals support SPI sensors and I2C EEPROM for calibration data. The 32 KB Flash is ample for calibration tables, linearization routines, and HART or Modbus protocol stacks. Designers can use the part's nanoWatt XLP modes to maintain sensor sampling accuracy without draining loop current.
推薦
Low-Power Data Logger
The PIC18LF25J11T-I/SO is a strong fit for portable data loggers where battery life and reliability dominate cost. Its 32 KB Flash supports on-chip buffering and circular log structures, while 4 KB of RAM accommodates time-stamped samples between writes to external SPI/I2C EEPROM or SD cards. The 10-bit ADC delivers adequate resolution for temperature, vibration, and pressure logging at sample rates up to 100 kbps, and the nanoWatt XLP Sleep mode keeps quiescent current under 1 µA between scheduled wake-ups. Real-time clock duties can be offloaded to the 31 kHz internal oscillator plus Timer1, eliminating an external RTC chip.
推薦
Small Appliance Control
Small home appliances - blenders, coffee makers, air purifiers, robotic vacuums - benefit from the PIC18LF25J11T-I/SO's integrated USB (for firmware updates and diagnostics), PWM-driven timers (for motor speed and heating element control), and 5V-tolerant I/O for direct interface to triac optocouplers and zero-cross detectors. The 12 MIPS throughput handles user-interface state machines plus closed-loop control without saturating the core, while 32 KB Flash is sufficient for menu logic, fault handling, and IoT-ready command parsing. Industrial temperature rating ensures reliable operation in kitchens and laundry rooms.
推薦
USB-to-Serial Bridge / CDC Device
Implementing a USB-to-UART bridge on a 28-SOIC board is straightforward with the PIC18LF25J11T-I/SO: its integrated USB Full-Speed device and dual USART modules allow the part to enumerate as a CDC ACM class device and transparently forward serial traffic at up to 115200 bps (or higher with hardware flow control). The 4 KB RAM buffers bidirectional traffic without overflow, while 32 KB Flash holds the CDC stack plus any vendor-specific commands. Industrial temperature and 3.3V operation make it ideal for replacing legacy RS-232 ports on test equipment, instrument clusters, and embedded development tools.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF25J11T-I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18LF25J11-I/SO | PIC18LF24J11T-I/SO | PIC18LF26J11T-I/SO | PIC18LF25J10T-I/SO | PIC18F25J11T-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC (SO) | 28-pin SOIC (SO) | 28-pin SOIC (SO) | 28-pin SOIC (SO) | 28-pin SOIC (SO) | 28-pin SOIC (SO) |
| Flash Memory | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB | 32 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB |
| Supply Voltage | 2.0 - 3.6 V | 2.0 - 3.6 V | 2.0 - 3.6 V | 2.0 - 3.6 V | 2.0 - 3.6 V | 2.0 - 3.6 V |
| USB Peripheral | Yes (USB 2.0 FS Device) | Yes (USB 2.0 FS Device) | Yes (USB 2.0 FS Device) | Yes (USB 2.0 FS Device) | No | Yes (USB 2.0 FS Device) |
| ADC | 10-bit, up to 10 ch | 10-bit, up to 10 ch | 10-bit, up to 10 ch | 10-bit, up to 10 ch | 10-bit, up to 10 ch | 10-bit, up to 10 ch |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
主要差異化特點
- Integrated USB 2.0 Full-Speed device with internal transceiver eliminates external PHY (對比PIC18LF25J10T-I/SO)
- Higher Flash density (32 KB vs 16 KB) preserves room for bootloaders and USB stacks (對比PIC18LF24J11T-I/SO)
- Tape-and-reel ('T') packaging optimized for high-volume SMT assembly (對比PIC18LF25J11-I/SO)
設計說明
The PIC18LF25J11T-I/SO's VDD range is 2.0-3.6V - operation above 3.6V can damage the part. Although the digital I/O pins are 5V-tolerant when VDD is at 3.3V, never drive any pin above 3.6V when VDD is below 3.0V; back-powering through I/O must be validated against the absolute maximum ratings in the datasheet. For battery applications, add a 100 nF decoupling capacitor close to VDD (pin 20) and a 4.7-10 µF bulk capacitor to handle USB inrush.
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 20) and a second 4.7 µF bulk capacitor at the board's power entry. Keep the VUSB decoupling capacitor (D+ line reference, typically 100 nF) close to the D+/D- pins to meet USB 2.0 Full-Speed signal integrity requirements. Use a solid ground plane under the SOIC-28 footprint and route the ICSP pins (RB6/PGC, RB7/PGD, MCLR) so they are accessible for in-circuit programming during prototyping.
Do not assume the LF and F J11 variants are firmware-compatible: PIC18LF25J11T-I/SO runs 2.0-3.6V only, while PIC18F25K22 supports 1.8-5.5V. Configure CONFIG1L/1H for the correct oscillator mode (HS, EC, INTIO) before code commits, and remember that INTIO67+PLL yields 48 MHz (12 MIPS) only when CONFIG1L is set correctly. The USB module requires the VUSB pin (or internal regulator) to be properly enabled in firmware and is sensitive to capacitor selection on D+; follow Microchip's AN572 'USB CDC Virtual COM Port' reference design for first-pass USB compliance.
Route the D+ and D- lines as a 90 Ω differential pair with matched length (within 150 mil) and keep them away from switching nodes or clock traces to pass USB 2.0 Full-Speed compliance. Place the 15 kΩ pull-up resistor on D+ (for full-speed device detection) close to the MCU. The 28-SOIC wide-body (300-mil) package has generous ground-pour opportunities - stitch vias around the perimeter to improve EMI performance and thermal dissipation, especially for designs running at 48 MHz with USB active.
合規資訊
RoHS compliance per Microchip product page. The LF25J11 family is not AEC-Q100 qualified; for automotive, consider the PIC18F25J11T-I/SO or PIC18FxxK22 automotive variants. Halogen-free status not explicitly stated in the provided data - verify with Microchip if required.
